Casing for an Electronic Device

1. A mobile electronic device casing comprising at least two inter-engageable shells formed by splitting a unitary blow moulded article, the shells comprising complementary inter-engageable formations configured to allow the shells to be sealably inter-engaged with respect to one another to, when interengaged, define an interior volume for housing a mobile electronic device, the interior volume formed from the interior volume defined by the un-slit unitary article, and wherein the inter-engaging formations are configured to be formed from features produced in the blow moulding process.

2. A casing as claimed in claim 1 , wherein at least one of the shells have one or more keys integral with the shell for actuation of a user-input interface of a housed mobile electronic device, and at least one of the shells have a window integral with the shell for permitting a display of a housed mobile electronic device to be viewed through the casing.

3. A casing as claimed in claim 1 , comprising one or more keys for touch-sensitive actuation of an input interface of a housed device.

4. A casing as claimed in claim 1 , wherein the one or more keys are configured to be user-movable with respect to the remainder of the shell to provide user-actuation of one or more corresponding keys of a mobile electronic device housed within the casing.

5. A casing as claimed in claim 1 , wherein at least one shell of the casing has the form of a sheath capable of encasing substantially all of the two major faces of the mobile electronic device.

6. A casing as claimed in claim 1 , wherein the casing is elongate about an axis and the shells are configured so as to be sealably interconnectable at an interface substantially perpendicular to that axis.

7. A casing as claimed in claim 1 , the casing is elongate about an axis and comprises three shells, the shells being configured so that one of the shells may be sealably interconnected to both of the other shells at respective interfaces substantially perpendicular to the said axis.

8. A casing as claimed in claim 1 , wherein at least one shell of the casing forms a lid portion for enclosing substantially all of a minor face of a device housed within the casing.

9. A casing as claimed in claim 1 , wherein at least one pair of shells is connected by means of a hinge.

10. A casing as claimed in claim 1 , wherein at least one of the shells comprises a gasket whereby the shells may be sealedly connected.

11. A casing as claimed in claim 1 , wherein the keys are connected to the remainder of the shell by flexible webs permitting relative movement between the keys and the remainder of the shell.

12. A casing as claimed in claim 1 , wherein each shell is impermeable to water.

13. A casing as claimed in claim 1 , wherein the casing does not comprise any electrical components, the electrical components being provided by a mobile electronic device housed in the casing.

14. A casing as claimed in claim 1 , wherein the display is configurable under the control of a controller to present to a user of the mobile electronic device information concerning the status of the mobile electronic device.

15. A casing as claimed in claim 1 , wherein the casing is cooperatively configured to the engine of the mobile electronic device, such that the casing can hold the mobile electronic device in a fixed location relative to the casing when the mobile electronic device is inserted into the casing with the plurality of keypads lying adjacent to respective portions of the user-actuable input interface when the mobile electronic device is enclosed within the casing.

16. A casing as claimed in claim 1 , wherein the casing has an opening for providing electrical connection to a device housed therein, the opening being formed from a blow hole of the blow moulding process.

17. A casing as claimed in claim 1 , wherein the mobile electronic device is such as to be capable of being charged by means of a field passing through the body of the casing.

18. A casing as claimed in claim 1 , wherein the mobile electronic device is a mobile telecommunication device.

19. A casing as claimed in claim 1 , wherein the mobile electronic device is a mobile telephone.

20. A casing as claimed in claim 1 , having the said mobile electronic device inserted therein.

21. A casing as claimed in claim 1 , wherein the casing is a casing suitable for enclosing a mobile electronic device engine.

22. A casing as claimed in claim 1 wherein the shells are comprised of walls having a substantially uniform thickness and protruding portions, at least some of said protruding portions projecting from the walls into the interior volume.

23. A casing as claimed in claim 22 , wherein at least some of the protruding portions of the casing are arranged for actuation of a user-actuable input interface of the mobile electronic device.

24. A casing as claimed in claim 23 , wherein the shells can be snap fastened together by means of the inter-engagement of at least one of the protruding portions of one shell with a corresponding formation on the other shell.

25. A mobile electronic device casing as claimed in claim 1 having a mobile electronic device housed in the casing.

26. A method for forming a mobile electronic device casing, the method comprising forming the casing by blow moulding to provide a unitary blow-moulded article enclosing an interior volume, slitting the unitary article to provide at least two inter-engaging shells configured to be sealably interconnectable with each other so as to enclose an interior volume for receiving the mobile electronic device, the enclosed interior volume of the inter-engaging shells formed from the enclosed interior volume of the unitary moulded article.

27. A method as claimed in claim 26 , wherein the step of forming the casing comprises forming the casing by extrusion blow moulding.

28. A method as claimed in claim 26 , wherein the step of forming the casing comprises forming the casing by injection blow moulding.

29. A method as claimed in claim 26 , further comprising: slitting the casing to form an opening therein; inserting the mobile electronic device through the opening; and closing the opening.

30. A method as claimed in claim 29 , wherein the step of slitting the casing comprises slitting the casing into two separate shells.

31. A method as claimed in claim 29 , wherein the step of slitting the unitary article comprises slitting the article into two shells that are joined by a web of material integral with the shells that constitutes a hinge, whereby one shell may be hinged relative to the other.

32. A method as claimed in claim 29 , wherein forming the casing comprises providing a mould to form the casing such that the casing is elongate about an axis and the slit is substantially perpendicular to that axis.

33. A method as claimed in claim 26 , wherein the step of forming the casing comprises forming the casing such that it comprises one or more protrusions that extend into the interior of the casing.

34. A method as claimed in claim 33 , wherein forming the casing comprises providing a mould to form the casing such that the casing comprises a plurality of keys integral with the casing for actuation of a user input interface of a housed device, and wherein the keys formed by the mould protrude into the interior of the device for engaging the user interface of a housed device.

35. A method as claimed in claim 26 , wherein forming the casing comprises providing a mould such that the casing is formed as a unitary component, having features that, once the unitary article is split into respective shells, provide each shell with at least one interlockable complementary formation to allow sealable inter-engagement of the respective shells.

36. A method as claimed in claim 35 , wherein the respective interlockable complementary formations are configured to be snap fastened together by a first interlocking formation on at least a first wall of a first shells that extends into the interior of the casing, and by a second interlocking formation on at least a second wall of another of the shells that extends towards the exterior of the casing, the respective interlockable formations, when engaged, being configured to resist detachment of the shells from one another.

37. A method as claimed in claim 36 , wherein forming the casing comprises providing a mould to form the casing such that at least one of the interlockable formations of the shells comprises a wall sloped so as to abut with a complementary wall on the other shell to cause the shell walls to slide past one another until the interlocking formations are engaged.

38. A mobile electronic device casing article, the article formed by the method of claim 24 .

39. A mould for use in the method of claim 26 .

40. A method as claimed in claim 26 , further comprising housing a mobile electronic device in the casing.